;;; tls.el --- TLS/SSL support via wrapper around GnuTLS;; Copyright (C) 2003 Free Software Foundation, Inc.;; Author: Simon Josefsson <simon@josefsson.org>;; Keywords: comm, tls, gnutls, ssl;; This file is part of GNU Emacs.;; GNU Emacs is free software; you can redistribute it and/or modify;; it under the terms of the GNU General Public License as published by;; the Free Software Foundation; either version 2, or (at your option);; any later version.;; GNU Emacs is distributed in the hope that it will be useful,;; but WITHOUT ANY WARRANTY; without even the implied warranty of;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the;; GNU General Public License for more details.;; You should have received a copy of the GNU General Public License;; along with GNU Emacs; see the file COPYING. If not, write to the;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,;; Boston, MA 02111-1307, USA.;;; Commentary:;; This package implements a simple wrapper around "gnutls-cli" to;; make Emacs support TLS/SSL.;;;; Usage is the same as `open-network-stream', i.e.:;;;; (setq tmp (open-tls-stream "test" (current-buffer) "news.mozilla.org" 563));; ...;; #<process test>;; (process-send-string tmp "mode reader\n");; 200 secnews.netscape.com Netscape-Collabra/3.52 03615 NNRP ready ...;; nil;; (process-send-string tmp "quit\n");; 205;; nil;; To use this package as a replacement for ssl.el by William M. Perry;; <wmperry@cs.indiana.edu>, you need to evaluate the following:;;;; (defalias 'open-ssl-stream 'open-tls-stream);;; Code:(eval-and-compile(autoload'format-spec"format-spec")(autoload'format-spec-make"format-spec"))(defgrouptlsnil"Transport Layer Security (TLS) parameters.":group'comm)(defcustomtls-program'("gnutls-cli -p %p %h""gnutls-cli -p %p %h --protocols ssl3")"List of strings containing commands to start TLS stream to a host.Each entry in the list is tried until a connection is successful.%s is replaced with server hostname, %p with port to connect to.The program should read input on stdin and write output tostdout. Also see `tls-success' for what the program should outputafter successful negotiation.":type'(repeatstring):group'tls)(defcustomtls-process-connection-typenil"*Value for `process-connection-type' to use when starting process.":type'boolean:group'tls)(defcustomtls-success"- Handshake was completed""*Regular expression indicating completed TLS handshakes.The default is what GNUTLS's \"gnutls-cli\" outputs.":type'regexp:group'tls)(defunopen-tls-stream(namebufferhostservice)"Open a TLS connection for a service to a host.Returns a subprocess-object to represent the connection.Input and output work as for subprocesses; `delete-process' closes it.Args are NAME BUFFER HOST SERVICE.NAME is name for process. It is modified if necessary to make it unique.BUFFER is the buffer (or buffer-name) to associate with the process. Process output goes at end of that buffer, unless you specify an output stream or filter function to handle the output. BUFFER may be also nil, meaning that this process is not associated with any bufferThird arg is name of the host to connect to, or its IP address.Fourth arg SERVICE is name of the service desired, or an integerspecifying a port number to connect to."(let((cmdstls-program)cmddone)(message"Opening TLS connection to `%s'..."host)(while(and(notdone)(setqcmd(popcmds)))(message"Opening TLS connection with `%s'..."cmd)(let*((process-connection-typetls-process-connection-type)(process(start-processnamebuffershell-file-nameshell-command-switch(format-speccmd(format-spec-make?hhost?p(if(integerpservice)(int-to-stringservice)service)))))response)(while(andprocess(memq(process-statusprocess)'(openrun))(save-excursion(set-bufferbuffer);; XXX "blue moon" nntp.el bug(goto-char(point-min))(not(setqdone(re-search-forwardtls-successnilt)))))(accept-process-outputprocess1)(sit-for1))(message"Opening TLS connection with `%s'...%s"cmd(ifdone"done""failed"))(ifdone(setqdoneprocess)(delete-processprocess))))(message"Opening TLS connection to `%s'...%s"host(ifdone"done""failed"))done))(provide'tls);;; tls.el ends here